PROBLEM TO BE SOLVED : To provide an information managing device, and information managing method and an information managing program that secure the correctness of real estate information and thereby help realize safe matching of the seller and the buyer.SOLUTION : An information managing device 100 comprises a memory unit 120 that stores object information regarding an object to be traded and a linking unit 133 that, when notified by the proprietor entitled to the object of his or her title to the object, links the object information regarding the object the proprietor is entitled to among the pieces of object information stored in the memory unit 120 and the proprietor between each other.SELECTED DRAWING : Figure 3COPYRIGHT : (C)2017, JPO&INPIT